Spin a wheel whose odds you can read for a growing payoff, or bank what you've built before a bust slot wipes it, the expected value is right there to guide you.
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How to play
Each round, choose to spin for more or bank your stash. The wheel shows its odds: most slots add to your round stake, but a bust slot zeros everything you've built that round. Bank to lock your winnings into your safe stash before a bust hits. Between rounds you draft a modifier card that reshapes the wheel, and the displayed expected value tells you when the odds have turned for or against you.
Spin to grow your round stake, or bank to keep it safe.
Landing on a bust slot wipes the unbanked stake for that round.
Draft a modifier between rounds to change the wheel's slots and odds.
Watch the expected value and bust chance to time your bank.
Game modes
Daily: the same run and draft for everyone.
Practice: a fresh random run each time.
Controls
Desktop: click Spin or Bank, and click a modifier card to draft it.
Phone & tablet: tap Spin or Bank, then tap a modifier card between rounds.
Tips & strategy
Bank once the expected value of another spin drops below what you'd risk losing.
A rising bust probability is your cue to lock in, don't chase a big stake into a likely wipe.
Draft modifiers that cut bust slots or lift payoffs, not just the flashiest reward.
What you'll learn
Odds On teaches probability and expected value through push-your-luck spins where the underlying math is always shown, so risk becomes calculation.
Skills: probability, expected value, risk and decision-making, fractions/percentages
Best for: roughly grades 7–10 (ages 12–16)
For parents & teachers: expected value made visceral through real decisions.
About Odds On
Odds On is an original, free browser game that teaches probability and expected value through push-your-luck spins where the math is always shown. Play instantly, no install needed.
A free, original browser game on PlayPendium. No download, no install.
